Jar-closure.



r. M. BELLES. JAR CLOSURE.

APPLICATION FILED APR. 2, 1910.

. 976,623. I Patnted Nov. 22, 1910.

FRANCIS MARION IBELLES, OF SHICKSHINNY, PENNSYLVANIA.

JAR-CLOSURE To all whom it may concern:

Be it known that I, FRANCIS MARION BELLEs, a citizen of the UnitedStates, residing at Shickshinny, in the county of Luzerne and State ofPennsylvania, have invented new and useful Improvements in JarClosures,of which the following is a specification.

This invention relates to jar closures or tops, and more particularly tothat class adapted to be held upon the jar by a clamp.

The main object of the invention is to provide a jar closure operativeto gradually and easily clamp the jar top in position and adapt the sameto bear with an even pres sure at all points upon the gasket or seal,thus effecting a perfectly air-tight closing of the mouth of the ar.

A further object of the invention is to provide a jar closure of thecharacter described which shall be proof against slipping when inclamping position, thus obviating all liability of the loosening ordetachment of the jar top.

The invention consists of the features of construction and arrangementof devices, hereinafter fully described and claimed, reference being hadto the accompanying drawing, in which Figure 1 is a side elevation of ajar with my improved closure applied. Fig. 2 is a vertical sectionalview of the same. Fig. 3 is a plan view of the jar top or cover. Fig. 4is a perspective view of the clamping yoke. Fig. 5 is a plan view of ajar opening and closing device.

Referring to the drawings, 1 designates a jar having the usual mouth orfilling opening 2, upstanding rim 3 and annular external shoulder 4, thelatter forming a sup port for the rubber sealing ring or gasket 5. Theneck of the jar is provided at diametrically opposite sides withdownwardly inclined grooves 6, terminating in horizontal or more gentlyinclined portions 7.

The top 8 of the jar may be made of glass, porcelain, or other suitablematerial and has a convex upper surface and is provided with a dependingflange 9 to engage and rest on the ring or gasket 5 and to press thelatter against the shoulder 4. Said top is also formed in its uppersurface with a central circular recess 9 to which leads a radial groove10, which groove merges at its outer end into the surface of the capadjacent its Specification of Letters Patent.

Application filed April 2, 1910.

Patented Nov. 22, 1910. Serial No. 552,994.

edge and gradually increases in depth toward the recess 9.

A clamp 11 is employed'to secure the top in jar-closing position and isof yoke form, as shown. The cross piece 12 of this clamp is providedwith a depending central lug 13 to fit within the recess 9, said lughaving its sides flattened for travel in the groove 10, by which thecross piece of the clamp is adapted to be engaged with and disengagedfrom the recess 9 by a radial sliding movement over the jar top.

The arms 14 of the yoke are provided at their lower ends with inwardlyextending projections 15 to engage the inclined grooves 6, the distancebetween said projections being less than that of the diameter of thecap, whereby the necessity of employing the groove 10 for the slidingengagement described when the top is in position and the clamp is to beapplied or removed will be apparent. In Fig. 5 I have shown what iscommonly known as an opener consisting of a semi-circular band 16 havinga lug 17 at one end thereof and a centrally disposed handle 18, by whichit may be manipulated, which opener may be employed when it is desiredto apply or remove a clamp which is difficult to adjust by the pressureof the hand alone.

In sealing the jar, the top or cap is placed in position with its flangeresting upon the gasket and its groove 10 so disposed as to enable theclamp to be slid into place thereon and to bring the projections 15 intothe upper ends of the inclined grooves 6. By then grasping and turningthe clamp, whose lug 13 pivots in the recess 9, the projections 15 willbe moved downwardly in the inclined grooves, thus drawing down the capso that its flange compresses the gasket and forms an air-tight sealingconnection therewith. By making the terminals of the inclined grooveshorizontal or more gently inclined, the projections are permitted toenter the same when the top is turned to an excess degree withoutincreasing the pressure on the gasket, while at the same time increasingthe distance the clamp must be turned to a released position, wherebygreater security against possible loosening of the cap is obtained. Theclamping action of the yoke, is, however, in general amply sufficient tohold it firmly against casual retraction. By a reverse movement of theclamp the top may be released to open the jar, as will be readilyunderstood.

If it should be necessary to employ the device 16 when'the'mu'scularpressure of the hand alone is not suflicient to apply or remove a clamp,the curved portion of said device is placed about the jar with its endlug l6 engaging one of the arms of the clamp and its oppositeend'bearing against the other arm of the clamp, and turning pressureapplied to said device by means of its handle 18 to rotate the clampinone'direction or the other, whereby said clampa may be easily applied'andremoved.

It will be seen from the foregoing description that my inventionprovides a simple and inexpensive-construction of j'arrlosure which maybe-conveniently manipulated and will produce a perfeotly'air-tight seal.7

' Having thus described the invention, I claim: a p

The combination with a jar having inclined grooves or threadsyof a caphaving a convex top surface provided with a central circular recess anda radial groove leading therefrom to the edge of the cap, said recessmerging at its outer end in the convex face and gradually increasingindepth to therecess, a clamp comprising a yoke having its arms providedwith projections for engagement with said grooves or threads, and a lugformed upon the cross bar of the yoke and depending therefrom forpivotal

